Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nha thuoc, cay thuoc
doc sach » hoc sach, toc sach, nuoc sach
cau treo » cau theo, cau tren, cau triet
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky lang xa hoi. hieu va ((nam thuoc) or (nam thu)) va dan va ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky lang xa hoi. hieu va ((nam thuoc) OR (nam thu)) va dan va ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ky lang xa hoi. hieu va ((nam thuoc) or (nam thu)) va dan va ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: doc sach ky lang xa hoi. hieu va ((nam thuoc) or (nam thu)) va dan va ((cuu tre) OR (cau treo))*.